page_title: List of the Paleozoic life of Ohio
section_title: R
hierarchical_section_title: List of the Paleozoic life of Ohio / R
caption_attribution_description: English: Rusophycus trace fossil from the Ordovician of southern Ohio. Scale bar is 10 mm.
context_page_description: This list of the Paleozoic life of Ohio contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Ohio and are between 541 and 252.17 million years of age.
context_section_description: †Rafinesquina
  †Rafinesquina alternata
  †Rafinesquina loxorhytis
  †Rafinesquina ponderosa
  †Rafinesquina squamula
  †Raistrickia
  †Raistrickia crinita
  †Raistrickia srinita
  †Ramphoprion
  †Raphistoma
  †Rasmussenoceras
  †Reinschospora
  †Reinschospora magnifica
  †Renalcis
  †Reptaria
  †Reptaria stolonifera
  †Reteocrinus
  †Reteporina
  †Reteporina striata
  †Retichonetes
  †Reticulatisporites
  †Reticulatisporites muricatus
  †Retispira
  †Retispira fascireticulatus – type locality for species
  †Retispira tenuilineata
  †Retispira waverliensis
  †Retrorsirostra
  †Retrorsirostra carleyi
  †Rhachicrinus
  †Rhachicrinus wrighti
  †Rhachiopteris
  †Rhapanocrinus
  †Rhegmaphyllum
  †Rhegmaphyllum daytonensis
  †Rhinidictya
  †Rhinocaris
  †Rhinocaris ehlersi
  †Rhipidomella
  †Rhipidomella pecosi
  †Rhipidomella penelope – or unidentified comparable form
  †Rhipidomella trigona
  †Rhipidomella vanuxemi
  †Rhipidothyris
   †Rhizocorallium
  †Rhombodictyon
  †Rhombopora
  †Rhombopora lepidodendroides
  †Rhombotrypa
  †Rhombotrypa subquadrata
  †Rhopolonaria
  †Rhopolonaria venosa
  †Rhynchopora
  †Rhynchotrema
  †Rhynchotrema denatum
  †Rhynchotrema dentatum
  †Rhynchotreta
  †Rhytimya
  †Rhytimya compressa
  †Rhytimya faberi
  †Rhytimya lunulata
  †Rhytimya oehana
  †Rhytimya radiata
  †Richmondoceras
  †Richmondoceras brevicameratum
  †Rizoceras
  †Ropalonaria
  †Royalella
  †Royalella quadrolirata – type locality for species
  †Royalella swallowiana – type locality for species
  †Ruedemannia
  †Ruedemannia trilix – type locality for species
  †Rugomena
  †Rugomena vetusta
  †Rugosochonetes
   †Rusophycus
  †Rusophycus biloba
caption: Fossil found in southern Ohio of the arthropod burrow ichnogenus Rusophycus
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